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Elements in Communication (in Hindi)
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Basics of communication, transmitter, link, receiver and modulation.

Udit Gupta
A Mechanical Engineer from NIT Allahabad here to help learners with physics. Also a Star ⭐ educator.

Unacademy user
thank you sir..... you made my fundamentals very clear
Udit Gupta
9 months ago
waaooo sir ..... thank you so much for this course .... thanks a lot 🙂🙂🙂
sirr communication is cmpllt ho gya naa sirr ???
Udit Gupta
a year ago
yes its done!
Karan Sharma B
a year ago
Sir why should be the height of antennae equal to quarter of the wavelength of the frequency?
Udit Gupta
a year ago
Because that is where the power peaks.
is there any formula for height of antenna??
Udit Gupta
a year ago
You can just use the quarter of wavelength in case it has not been specified.
  1. Satellite & Communication Udit Gupta

  2. Welcome to the 1st lesson. Today we will talk about an Basic communication system, transmitter, receiver, communication channel and modulation Don't forget to check the SPECIAL CLASSES

  3. Basic Communication System A basic communication system consists of an information source, a transmitter, a link and a receiver The transmission of information can only occur when sender and receiver understand a common language. Link Source of information TransmitterReceiver Output signal (Channel)

  4. Transmitter In radio transmission, the transmitter consists of a transducer, modulator amplifier and transmitting antenna Transducer: Converts sound signals into electric signal. Modulator: Mixing of audio electric signal with Amplifier: Boosting the power of modulated signal. Antenna: Signal is radiated in the space with the aid of an antenna. high frequency radio wave Antenna Transducer | Modulator Amplifier Transmitter

  5. Communication Channel The function of communication channel is to carry the modulated signal from transmitter to receiver. The communication channel is also called transmission medium or link.

  6. Receiver The receiver consists of antenna, demodulator, amplifier and transducer. Pickup Antenna: To pick the signal Demodulator: To separate out the audio signal from the modulated signal Amplifier: To boost up the weak audio signal Transducer: Converts electric Signal into audio signal. iAntenna Demodulator Amplifier Transducer Receiver

  7. Modulation The process of superposition of a low frequency (LF) signal over the high frequency (HF) signal is known as modulation. : Need for Modulation: Digital and analog signals to be transmitted are usually of low frequency and hence cannot be transmitted to long distances. Height of antenna: For efficient radiation and reception, the height of the transmitting and receiving antennas should be comparable to a quarter of wavelength of the frequency used.


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